Malicious PDF — malware analysis report

Static analysis result for SHA-256 61148afd628521e3…

MALICIOUS

PDF

80.6 KB Created: 2021-09-12 02:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 63671ea5d30eed59b33cf561123ae0ad SHA-1: ada9cdb0e6ea0fe5fc8d0d305ce99301517074c6 SHA-256: 61148afd628521e342197c257a2e9b11ae105442e4bafe6adce55216873025e9
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dagvandearchitectuur.be/_files/file/31670374966.pdf In PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/39036681504.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/76784213664.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/17931499712.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/pelunojop.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/wenutiwi.pdfIn PDF document text
    • http://15881588.com/ckupload/files/78035377954.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/guvotewevunazedejuxinigor.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/50827068716.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/mewofe.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/paroses.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210912074347.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/funosatipoj.pdfIn PDF document text
    • http://888spirits.com/userfiles/file/nivokobavimugosazovabi.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-6/20210906091730112297.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/85122613077.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/vawoxawunuginubereledi.pdfIn PDF document text
    • http://ekmeta.lt/failai/file/89835619415.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/tibekimidenepizesuboleza.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/jujupasijelulo.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/92577893350.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/wesudakuvoxuvogope.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/jujowolowiton.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=google+chrome+lite+apk+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 16652 bytes
SHA-256: da45eaeed39fedf781e63d81c369df4fe8ad5d510c47b896a2f7abf2f00f1bd8
font_01_sfnt_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 11008 bytes
SHA-256: bc788cf92552dd38405ce042c397b63a4ada9521ad66b384d6a8d3d8b86f1e33
font_02_sfnt_off00011d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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